A long term "girlfriend" in every way, but excluding the physical aspects and minus the actual deceleration of being in any form of relationship past friend. Often shortened to just pseudo. Derogatory remark.
P1 - Going out with your pseudo-girlfriend tonight?
P2 - Yeah.
P1 - Are you ever going to properly date her?
P2 - It's not that type of relationship.
P1 - Pussy.